Knol-khol originated in Western Europe and is a type of cabbage with an edible swollen stem. It is high in vitamins and minerals and has potential health benefits. The document discusses the morphology, varieties, growing requirements, and cultivation practices of knol-khol such as suitable climates, soils, fertilization, irrigation, pests and diseases, and harvesting at the tender stage.

1. KNOL KHOL
PRESENTED BY :-HARMANJEET SINGH
A-2015-30-075
(VEGETABLES SCIENCE)
CSKHPKV PALAMPUR
(Brassica oleraceae var. gongylodes)

2. CONTENT
• Introduction
• Health Benefits Of Knol-khol
• Morphology
• Climatic Requirement
• Soil
• Varieties
• Seed Rate And Time Of Sowing
• Transplanting
• Manuring And Fertilization
• After Care
• Irrigation
• Pest & Diseases
• Harvesting

3. INTRODUCTION
 Family:- Brassicaceae
 Origin:- Western coastal Europe
 It is believed to be originated in the Western coastal Europe.
 Also known as Kohlrabi, Kohlrabi greens, Navalkol, Gunth Gobhi,
 The Whole plant is edible however, it is mostly used for its bulged
swollen stem

4. INTRODUCTION CONTI…..
 Knol-khol is originated from wild cabbage (B. oleracea var.
sylvestris)
 Purple/Early varieties are more susceptible to premature bolting.
 In India, knol-khol is more popular in kashmir and minor crop in
West Bengal, Himachal pradesh, Karnataka.
 In Kashmir, knol-khol leaves are also used as greens.
 It is excellent vegetable if used at its early stage before it becomes
tough and fibrous.

5. HEALTH BENEFITS OF KNOL-KHOL
• It is a rich source of minerals like Ca, Mg, P, K, Na, and S.
• Rich in the antioxidant , so helps fight cancer
• Contains high amounts of vitamins C, E and carotene
• Considered good sources of dietary fiber
• Contains sulphoraphanes and other isothiocyanates, which are
believed to stimulate the production of protective enzymes in the
body
• Have antidiabetic activity

6. MORPHOLOGY
• Formation of knob (tuber) which arises from a thickening of the
stem tissue above the cotyledons
• The fleshy edible proration is an enlargement of the stem, which
develops entirely above ground and is used as a vegetable
• The edible portion is globular to a slightly flattened stem

7. CLIMATIC REQUIREMENT
 Cool season crop
Temperature
 It can withstand extreme cold and frost better than
other cool season crop
 Optimum temperature 15 0C to 200C
 Tuber production 100C to 200C
 When grown below 15 0C for extended period early
varieties produce flower stalks (bolting) directly
without forming knobs
 Purple varieties more prone to bolting.

8.  Successfully grown on all types of soil
 But the sandy loam and clay loam soils are best
suitable
 pH 5.5-6.8
 A soil rich in manures and fertilizers produces
excellent knobs
 Does not grow well in highly acidic soil
SOIL

9. VARIETIES
• Palam Tender Knob
• White Vienna
• Purple Vienna
• King of North
• Large Green

10. PALAM TENDER KNOB :
• This variety has small round knobs
• Yield 250–275q/ha

11. WHITE VIENNA :
• This is an early variety with globular, light green, smooth, tender,
medium-sized knobs having creamy-white tender flesh with
delicate flavor
• Plants are dwarf, leaves and stems are medium green
• Yield potential of 150–200q/ha
• It matures 55–65 days after transplanting
• Takes 50–60 days for knob formation

12. PURPLE VIENNA
• Medium size
• one week later than White Vienna
• Knobs are purplish-blue with greenish-white flesh
• It has purple leaves
• It requires 55–65 days for knob formation with slightly better
yield potential than White Vienna

13. KING OF NORTH
• Plant height of 20–30cm foliage is dark green, knob flattish-
round, leaf sheath large and well-spread over the knob
• It matures 60–65 days after transplanting
• Early varieties mature 30–45 days after planting & characterized
by the horizontal position of the lower leaves
• The late varieties mature 70–100 days after planting

14. •SEED RATE :- 1 to 1.5 kg/ha
•TIME OF SOWING:-
- North Indian plains : September - November.
- Hills : March to August
Variety Time of sowing seed
in Nursery
Time of
transplanting in the
main field
Early August September
Main September October
Late October November

15. TRANSPLANTING
• 3 to 4 week old seedlings become ready for transplanting
• Ridges and furrow type beds used
• SPACING : 25cm × 25cm, 25cm × 30cm, 25cm × 40cm, 30cm ×
20cm or 30cm × 45cm depending on climatic condition
• Seedlings should be watered and protection may
be given from sun rays for 4 – 5 days

16. MANURING AND FERTILIZATION
• Knol-khol responds well to manuring, as it is a heavy feeder.
• Add N -- 100 kg/ha ,
P -- 80 to 90 kg/ ha ,
K – 150 to 175 kg/ha.
• Nitrogen is applied in 2 equal split doses, 3 weeks after transplanting
and at knob development stage .

17. AFTER CARE
• Weeds are removed from field by hand weeding.
• Generally 2-3 weeding are done in the initial stage of growth.
• The field must be kept free from weeds.
• Plant should be earthen up after 25 – 30 days of transplantation.

18. IRRIGATION
• Knol-khol requires a continuous supply of moisture for uniform
growth and development of knobs
• After transplanting, should be watered for 4 to 5 days (as stated
the seedlings, after transplanting, should be watered for four to
five days)
• Should be given an interval of 6 to 7 days
• Thereafter irrigation is done when needed, depending on soil and
weather conditions

19. PEST & DISEASES
PESTS
• Aphids
• Thrips
• Mustard saw fly
• Semi looper
• Nematods
• Caterpillars & beetles

20. DISEASES
• Damping off
• Leaf spot & blight
• Club root
• Black rot
• Root fly

21. PEST & DISEASES CONTROL
• Pruning of the old leaves
• Weed control & clean of field
• Use chemical & organic pesticides (foliar spray of garlic extract at
3% concentration, Spray Trichoderma at 2-3 % against root fly &
black rot)

22. HARVESTING
• Done at tender stage when the knobs attain 6-8 cm diameter
• Knobs are harvested by cutting the stem just below it by a sharp
knife or sickle before they are fully grown
• Should be harvested with few leaves for nearby markets and
without leaves for distant markets.
• Delayed in harvesting results in fibrous knobs development.